Re: 2.4 vm, program load, page faulting, ...

Alex Tomas
2003-03-17T16:35:00Z

>>>>> William Lee Irwin (WLI) writes:

WLI> On Mon, Mar 17, 2003 at 10:02:21AM -0500, Rik van Riel wrote:
>> The mmap() syscall only sets up the VMA info, it doesn't fill in
>> the page tables. That only happens when the process page faults.
>> Note that filling in a bunch of page table entries mapping already
>> present pagecache pages at exec() time might be a good idea. It's
>> just that nobody has gotten around to that yet...

WLI> SVR4 did and saw an improvement wrt. page fault rate, according
WLI> to Vahalia.

WLI> I'd like to see whether this is useful for Linux.

I tried this on dual P3 year and half ago and didn't see any improvement